User`s guide

7-2

Agilent Technologies E5500 Phase Noise Measurement System

Absolute Measurement Examples

Stable RF Oscillator

This measurement example will help you measure the phase noise of a stable

RF oscillator with frequency drift of <20 ppm over a period of thirty

minutes.

CAUTION To prevent damage to the Agilent/HP 70420A test set’s hardware

components, the input signal must not be applied to the signal input

connector until the input attenuator has been correctly set for the desired

configuration, as show in Table 7-3 on page 7-9. Apply the input signal

when the Connection Diagram appears.

Required Equipment The following equipment is required for this example in addition the phase

noise test system and your unit-under-test (UUT).

NOTE To ensure accurate measurements, you should allow the UUT and

measurement equipment to warm up at least one hour before making the

noise measurement.

Table 7-1 Required Equipment for the Stable RF

Oscillator Measurement Example

Equipment Quantity Comments

VCO Reference Source 1 Refer to Chapter 6, “Selecting a

Reference” for more information

about reference source

requirements

Coax Cables And adequate adapters to connect

the UUT and reference source to

the test set.